PRODUCT SUPPORT PROGRAM FOR REWORKING THE REAR PUMP DRIVE LINES GROUP ON CERTAIN 994K WHEEL LOADERS
AVSpare’s obligations under this Service Letter are subject to, and shall not apply in contravention of, the laws, rules, regulations, directives, ordinances, orders, or statutes of the United States, or of any other applicable jurisdiction, without recourse or liability with respect to AVSpare.
This Program must be administered either before or after failure. In either case the decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS46516" as the Part Number and "7755" as the Group Number. If administered before failure, use "56" as the Warranty Claim Description Code and "T" as the SIMS Description code. If administered after failure, use "96" as the Warranty Claim Description Code, and "Z" as the SIMS Description Code.
The information supplied in this service letter may not be valid after the termination date of this program. Do not perform the work outlined in this Service Letter after the termination date without first contacting your AVSpare product analyst.
|The existing 424-6183 Lines Group can provide insufficient lubrication flow to the rear pump drive at start up on certain 994K Wheel Loaders. If the existing 424-6183 Lines Group provides insufficient lubrication for extended periods of time, it could lead to 6M-1637/6M-1638 Rear Pump Drive bearing failure.
Rear pump drive lubrication oil is provided primarily from the air to oil cooler return circuit, and in lower ambient conditions this oil can remain too cold for too long to provide adequate rear pump drive oil flow.
|1||4D4508||SEAL-O-RING (After Failure Only)|
|1||5P6868||SEAL-LIP TYPE (After Failure Only)|
|2||6M1637||BEARING-CONE (After Failure Only)|
|2||6M1638||BEARING-CUP (After Failure Only)|
|1||6Y6678||SHIM-PACK (After Failure Only)|
|1||7H2444||SEAL-O-RING (After Failure Only)|
|1||7X0349||BOLT (After Failure Only)|
|1||4271299||CAGE-BEARING (After Failure Only)|
|1||4271304||SHAFT AS-OUTPUT (After Failure Only)|
|In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 11% of dealership population. This is an initial order recommendation only, and the ultimate responsibility for ordering the total number of parts needed to satisfy the program lies with the dealer.
|Rework required on 424-6183 Powertrain Lines Group. Refer to Image1 for the lines group location. The new lines group revision will relocate the rear pump drive lubrication supply source from before to after the water to oil cooler connection. This directs warmer oil to the rear pump drive and improves flow at start up. Refer to Images1, 2, 3, and 4.
Current view of existing lines group - Refer to Image2.
View of new lines group when complete - Refer to Image3.
For the 455-5353 Manifold attached to the water to oil cooler outlet, reposition the 6G-1444 Adapter and attached 6V-9008 Elbow to the opposite side of the 455-5353 Manifold, and also replace three hose assemblies attached to the 455-5353 Manifold.
Complete the Rework Procedure below:
1. Drain oil as required to allow for hose replacement.
2. Replace the existing 455-5372 Hose Assembly with a new 583-8024 Hose Assembly. Remove the 6G-1444 Adapter and 6V-9008 Elbow at the 455-5372 Hose Assembly connection to the 455-5353 Manifold. Retain the adapter and elbow, they will be reused on the other side of the manifold.
3. Install a new 447-7206 O-Ring Seal at each end of 583-8024 Hose Assembly. Attach each end of 583-8024 Hose Assembly with four 8T-4183 Bolts.
4. Replace the existing 428-9183 Hose Assembly with a new 583-8025 Hose Assembly.
a) Install a new 6G-1444 Adapter at the connection of the 583-8025 Hose Assembly to the 455-5353 Manifold.
b) Install a 235-2478 Rectangular Seal between the 6G-1444 Adapter and 455-5353 Manifold.
c) Install a 447-7206 O-Ring Seal at each end of 583-8025 Hose Assembly.
d) Attach the end of 583-8025 Hose Assembly at 6G-1444 Adapter and 455-5353 Manifold with four 8T-4176 Bolts.
e) Attach the end of the 583-8025 Hose Assembly at the 428-9178 Tube Assembly with four 8T-4183 Bolts.
5. Replace the existing 526-3759 Hose Assembly with a new 571-9509 Hose Assembly.
a) Install a 6V-9008 Elbow as required in the 6G-1444 Adapter port.
b) Install a 238-5084 O-Ring Seal between the 6V-9008 Elbow and 6G-1444 Adapter.
c) Install a 228-7093 O-Ring Seal between the 571-9509 Hose Assembly and 6V-9008 Elbow.
d) Install a 228-7092 O-Ring Seal between the 571-9059 Hose Assembly and 8T-1718 Adapter at the rear pump drive group.
e) Install a 228-7091 O-Ring Seal between the 8T-1718 Adapter and 6V-8632 Adapter at the rear pump drive group.
6. Replace oil in transmission lubrication circuit per service manual instructions.
SERVICE CLAIM ALLOWANCES
|NOTE: This is a 3.0-hour job|
|Note: Before Failure - $250 US Dollars is allowed for 62 Liters of TDTO oil.|
Note: After Failure - $1500 IS Dollars is allowed for 352 Liters of TDTO oil.
|Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.|